[mirror_edk2.git] / ArmPkg / Library / DefaultExceptionHandlerLib / Arm / DefaultExceptionHandler.c

/** @file\r
  Default exception handler\r
\r
  Copyright (c) 2008 - 2010, Apple Inc. All rights reserved.<BR>\r
  Copyright (c) 2012 - 2021, Arm Ltd. All rights reserved.<BR>\r
\r
  SPDX-License-Identifier: BSD-2-Clause-Patent\r
\r
**/\r
\r
#include <Uefi.h>\r
#include <Library/BaseLib.h>\r
#include <Library/DebugLib.h>\r
#include <Library/PeCoffGetEntryPointLib.h>\r
#include <Library/PrintLib.h>\r
#include <Library/ArmDisassemblerLib.h>\r
#include <Library/SerialPortLib.h>\r
#include <Library/UefiBootServicesTableLib.h>\r
#include <Library/UefiLib.h>\r
\r
#include <Guid/DebugImageInfoTable.h>\r
\r
#include <Protocol/DebugSupport.h>\r
#include <Library/DefaultExceptionHandlerLib.h>\r
\r
//\r
// The number of elements in a CHAR8 array, including the terminating NUL, that\r
// is meant to hold the string rendering of the CPSR.\r
//\r
#define CPSR_STRING_SIZE  32\r
\r
typedef struct {\r
  UINT32    BIT;\r
  CHAR8     Char;\r
} CPSR_CHAR;\r
\r
STATIC CONST CPSR_CHAR  mCpsrChar[] = {\r
  { 31, 'n' },\r
  { 30, 'z' },\r
  { 29, 'c' },\r
  { 28, 'v' },\r
\r
  { 9,  'e' },\r
  { 8,  'a' },\r
  { 7,  'i' },\r
  { 6,  'f' },\r
  { 5,  't' },\r
  { 0,  '?' }\r
};\r
\r
CHAR8 *\r
GetImageName (\r
  IN  UINTN  FaultAddress,\r
  OUT UINTN  *ImageBase,\r
  OUT UINTN  *PeCoffSizeOfHeaders\r
  );\r
\r
/**\r
  Convert the Current Program Status Register (CPSR) to a string. The string is\r
  a defacto standard in the ARM world.\r
\r
  It is possible to add extra bits by adding them to mCpsrChar array.\r
\r
  @param  Cpsr         ARM CPSR register value\r
  @param  ReturnStr    CPSR_STRING_SIZE byte string that contains string\r
                       version of CPSR\r
\r
**/\r
VOID\r
CpsrString (\r
  IN  UINT32  Cpsr,\r
  OUT CHAR8   *ReturnStr\r
  )\r
{\r
  UINTN  Index;\r
  CHAR8  *Str;\r
  CHAR8  *ModeStr;\r
\r
  Str = ReturnStr;\r
\r
  for (Index = 0; mCpsrChar[Index].BIT != 0; Index++, Str++) {\r
    *Str = mCpsrChar[Index].Char;\r
    if ((Cpsr & (1 << mCpsrChar[Index].BIT)) != 0) {\r
      // Concert to upper case if bit is set\r
      *Str &= ~0x20;\r
    }\r
  }\r
\r
  *Str++ = '_';\r
  *Str   = '\0';\r
\r
  switch (Cpsr & 0x1f) {\r
    case 0x10:\r
      ModeStr = "usr";\r
      break;\r
    case 0x011:\r
      ModeStr = "fiq";\r
      break;\r
    case 0x12:\r
      ModeStr = "irq";\r
      break;\r
    case 0x13:\r
      ModeStr = "svc";\r
      break;\r
    case 0x16:\r
      ModeStr = "mon";\r
      break;\r
    case 0x17:\r
      ModeStr = "abt";\r
      break;\r
    case 0x1b:\r
      ModeStr = "und";\r
      break;\r
    case 0x1f:\r
      ModeStr = "sys";\r
      break;\r
\r
    default:\r
      ModeStr = "???";\r
      break;\r
  }\r
\r
  //\r
  // See the interface contract in the leading comment block.\r
  //\r
  AsciiStrCatS (Str, CPSR_STRING_SIZE - (Str - ReturnStr), ModeStr);\r
}\r
\r
CHAR8 *\r
FaultStatusToString (\r
  IN  UINT32  Status\r
  )\r
{\r
  CHAR8  *FaultSource;\r
\r
  switch (Status) {\r
    case 0x01: FaultSource = "Alignment fault";\r
      break;\r
    case 0x02: FaultSource = "Debug event fault";\r
      break;\r
    case 0x03: FaultSource = "Access Flag fault on Section";\r
      break;\r
    case 0x04: FaultSource = "Cache maintenance operation fault[2]";\r
      break;\r
    case 0x05: FaultSource = "Translation fault on Section";\r
      break;\r
    case 0x06: FaultSource = "Access Flag fault on Page";\r
      break;\r
    case 0x07: FaultSource = "Translation fault on Page";\r
      break;\r
    case 0x08: FaultSource = "Precise External Abort";\r
      break;\r
    case 0x09: FaultSource = "Domain fault on Section";\r
      break;\r
    case 0x0b: FaultSource = "Domain fault on Page";\r
      break;\r
    case 0x0c: FaultSource = "External abort on translation, first level";\r
      break;\r
    case 0x0d: FaultSource = "Permission fault on Section";\r
      break;\r
    case 0x0e: FaultSource = "External abort on translation, second level";\r
      break;\r
    case 0x0f: FaultSource = "Permission fault on Page";\r
      break;\r
    case 0x16: FaultSource = "Imprecise External Abort";\r
      break;\r
    default:   FaultSource = "No function";\r
      break;\r
  }\r
\r
  return FaultSource;\r
}\r
\r
STATIC CHAR8  *gExceptionTypeString[] = {\r
  "Reset",\r
  "Undefined OpCode",\r
  "SVC",\r
  "Prefetch Abort",\r
  "Data Abort",\r
  "Undefined",\r
  "IRQ",\r
  "FIQ"\r
};\r
\r
/**\r
  This is the default action to take on an unexpected exception\r
\r
  Since this is exception context don't do anything crazy like try to allocate memory.\r
\r
  @param  ExceptionType    Type of the exception\r
  @param  SystemContext    Register state at the time of the Exception\r
\r
\r
**/\r
VOID\r
DefaultExceptionHandler (\r
  IN     EFI_EXCEPTION_TYPE  ExceptionType,\r
  IN OUT EFI_SYSTEM_CONTEXT  SystemContext\r
  )\r
{\r
  CHAR8    Buffer[100];\r
  UINTN    CharCount;\r
  UINT32   DfsrStatus;\r
  UINT32   IfsrStatus;\r
  BOOLEAN  DfsrWrite;\r
  UINT32   PcAdjust;\r
\r
  PcAdjust = 0;\r
\r
  CharCount = AsciiSPrint (\r
                Buffer,\r
                sizeof (Buffer),\r
                "\n%a Exception PC at 0x%08x  CPSR 0x%08x ",\r
                gExceptionTypeString[ExceptionType],\r
                SystemContext.SystemContextArm->PC,\r
                SystemContext.SystemContextArm->CPSR\r
                );\r
  SerialPortWrite ((UINT8 *)Buffer, CharCount);\r
  if (gST->ConOut != NULL) {\r
    AsciiPrint (Buffer);\r
  }\r
\r
  DEBUG_CODE_BEGIN ();\r
  CHAR8   *Pdb;\r
  UINT32  ImageBase;\r
  UINT32  PeCoffSizeOfHeader;\r
  UINT32  Offset;\r
  CHAR8   CpsrStr[CPSR_STRING_SIZE];    // char per bit. Lower 5-bits are mode\r
                                        // that is a 3 char string\r
  CHAR8   Buffer[80];\r
  UINT8   *DisAsm;\r
  UINT32  ItBlock;\r
\r
  CpsrString (SystemContext.SystemContextArm->CPSR, CpsrStr);\r
  DEBUG ((DEBUG_ERROR, "%a\n", CpsrStr));\r
\r
  Pdb    = GetImageName (SystemContext.SystemContextArm->PC, &ImageBase, &PeCoffSizeOfHeader);\r
  Offset = SystemContext.SystemContextArm->PC - ImageBase;\r
  if (Pdb != NULL) {\r
    DEBUG ((DEBUG_ERROR, "%a\n", Pdb));\r
\r
    //\r
    // A PE/COFF image loads its headers into memory so the headers are\r
    // included in the linked addresses. ELF and Mach-O images do not\r
    // include the headers so the first byte of the image is usually\r
    // text (code). If you look at link maps from ELF or Mach-O images\r
    // you need to subtract out the size of the PE/COFF header to get\r
    // get the offset that matches the link map.\r
    //\r
    DEBUG ((DEBUG_ERROR, "loaded at 0x%08x (PE/COFF offset) 0x%x (ELF or Mach-O offset) 0x%x", ImageBase, Offset, Offset - PeCoffSizeOfHeader));\r
\r
    // If we come from an image it is safe to show the instruction. We know it should not fault\r
    DisAsm  = (UINT8 *)(UINTN)SystemContext.SystemContextArm->PC;\r
    ItBlock = 0;\r
    DisassembleInstruction (&DisAsm, (SystemContext.SystemContextArm->CPSR & BIT5) == BIT5, TRUE, &ItBlock, Buffer, sizeof (Buffer));\r
    DEBUG ((DEBUG_ERROR, "\n%a", Buffer));\r
\r
    switch (ExceptionType) {\r
      case EXCEPT_ARM_UNDEFINED_INSTRUCTION:\r
      case EXCEPT_ARM_SOFTWARE_INTERRUPT:\r
      case EXCEPT_ARM_PREFETCH_ABORT:\r
      case EXCEPT_ARM_DATA_ABORT:\r
        // advance PC past the faulting instruction\r
        PcAdjust = (UINTN)DisAsm - SystemContext.SystemContextArm->PC;\r
        break;\r
\r
      default:\r
        break;\r
    }\r
  }\r
\r
  DEBUG_CODE_END ();\r
  DEBUG ((DEBUG_ERROR, "\n  R0 0x%08x   R1 0x%08x   R2 0x%08x   R3 0x%08x\n", SystemContext.SystemContextArm->R0, SystemContext.SystemContextArm->R1, SystemContext.SystemContextArm->R2, SystemContext.SystemContextArm->R3));\r
  DEBUG ((DEBUG_ERROR, "  R4 0x%08x   R5 0x%08x   R6 0x%08x   R7 0x%08x\n", SystemContext.SystemContextArm->R4, SystemContext.SystemContextArm->R5, SystemContext.SystemContextArm->R6, SystemContext.SystemContextArm->R7));\r
  DEBUG ((DEBUG_ERROR, "  R8 0x%08x   R9 0x%08x  R10 0x%08x  R11 0x%08x\n", SystemContext.SystemContextArm->R8, SystemContext.SystemContextArm->R9, SystemContext.SystemContextArm->R10, SystemContext.SystemContextArm->R11));\r
  DEBUG ((DEBUG_ERROR, " R12 0x%08x   SP 0x%08x   LR 0x%08x   PC 0x%08x\n", SystemContext.SystemContextArm->R12, SystemContext.SystemContextArm->SP, SystemContext.SystemContextArm->LR, SystemContext.SystemContextArm->PC));\r
  DEBUG ((DEBUG_ERROR, "DFSR 0x%08x DFAR 0x%08x IFSR 0x%08x IFAR 0x%08x\n", SystemContext.SystemContextArm->DFSR, SystemContext.SystemContextArm->DFAR, SystemContext.SystemContextArm->IFSR, SystemContext.SystemContextArm->IFAR));\r
\r
  // Bit10 is Status[4] Bit3:0 is Status[3:0]\r
  DfsrStatus = (SystemContext.SystemContextArm->DFSR & 0xf) | ((SystemContext.SystemContextArm->DFSR >> 6) & 0x10);\r
  DfsrWrite  = (SystemContext.SystemContextArm->DFSR & BIT11) != 0;\r
  if (DfsrStatus != 0x00) {\r
    DEBUG ((DEBUG_ERROR, " %a: %a 0x%08x\n", FaultStatusToString (DfsrStatus), DfsrWrite ? "write to" : "read from", SystemContext.SystemContextArm->DFAR));\r
  }\r
\r
  IfsrStatus = (SystemContext.SystemContextArm->IFSR & 0xf) | ((SystemContext.SystemContextArm->IFSR >> 6) & 0x10);\r
  if (IfsrStatus != 0) {\r
    DEBUG ((DEBUG_ERROR, " Instruction %a at 0x%08x\n", FaultStatusToString (SystemContext.SystemContextArm->IFSR & 0xf), SystemContext.SystemContextArm->IFAR));\r
  }\r
\r
  DEBUG ((DEBUG_ERROR, "\n"));\r
  ASSERT (FALSE);\r
\r
  CpuDeadLoop ();   // may return if executing under a debugger\r
\r
  // Clear the error registers that we have already displayed incase some one wants to keep going\r
  SystemContext.SystemContextArm->DFSR = 0;\r
  SystemContext.SystemContextArm->IFSR = 0;\r
\r
  // If some one is stepping past the exception handler adjust the PC to point to the next instruction\r
  SystemContext.SystemContextArm->PC += PcAdjust;\r
}\r
Commit	Line	Data
6f72e28d	1	/** @file\r
	2	Default exception handler\r
	3	\r
d6ebcab7	4	Copyright (c) 2008 - 2010, Apple Inc. All rights reserved.<BR>\r
7785b38a	5	Copyright (c) 2012 - 2021, Arm Ltd. All rights reserved.<BR>\r
3402aac7	6	\r
4059386c	7	SPDX-License-Identifier: BSD-2-Clause-Patent\r
6f72e28d	8	\r
	9	**/\r
	10	\r
	11	#include <Uefi.h>\r
6f72e28d	12	#include <Library/BaseLib.h>\r
	13	#include <Library/DebugLib.h>\r
	14	#include <Library/PeCoffGetEntryPointLib.h>\r
7755dfd3	15	#include <Library/PrintLib.h>\r
097bd461	16	#include <Library/ArmDisassemblerLib.h>\r
7755dfd3	17	#include <Library/SerialPortLib.h>\r
31f53880	18	#include <Library/UefiBootServicesTableLib.h>\r
00755e1c	19	#include <Library/UefiLib.h>\r
6f72e28d	20	\r
6f72e28d	21	#include <Guid/DebugImageInfoTable.h>\r
6f72e28d	22	\r
619b3998	23	#include <Protocol/DebugSupport.h>\r
619b3998	24	#include <Library/DefaultExceptionHandlerLib.h>\r
6f72e28d	25	\r
a1848bc0 LE	26	//\r
	27	// The number of elements in a CHAR8 array, including the terminating NUL, that\r
	28	// is meant to hold the string rendering of the CPSR.\r
	29	//\r
429309e0	30	#define CPSR_STRING_SIZE 32\r
a1848bc0	31	\r
6f72e28d	32	typedef struct {\r
429309e0 MK	33	UINT32 BIT;\r
429309e0 MK	34	CHAR8 Char;\r
6f72e28d	35	} CPSR_CHAR;\r
6f72e28d	36	\r
429309e0	37	STATIC CONST CPSR_CHAR mCpsrChar[] = {\r
7785b38a PG	38	{ 31, 'n' },\r
	39	{ 30, 'z' },\r
	40	{ 29, 'c' },\r
	41	{ 28, 'v' },\r
	42	\r
	43	{ 9, 'e' },\r
	44	{ 8, 'a' },\r
	45	{ 7, 'i' },\r
	46	{ 6, 'f' },\r
	47	{ 5, 't' },\r
	48	{ 0, '?' }\r
	49	};\r
	50	\r
6f72e28d	51	CHAR8 *\r
6f72e28d	52	GetImageName (\r
c63626b7	53	IN UINTN FaultAddress,\r
	54	OUT UINTN *ImageBase,\r
	55	OUT UINTN *PeCoffSizeOfHeaders\r
619b3998	56	);\r
6f72e28d	57	\r
6f72e28d	58	/**\r
3402aac7 RC	59	Convert the Current Program Status Register (CPSR) to a string. The string is\r
	60	a defacto standard in the ARM world.\r
	61	\r
7785b38a	62	It is possible to add extra bits by adding them to mCpsrChar array.\r
6f72e28d	63	\r
6f72e28d	64	@param Cpsr ARM CPSR register value\r
a1848bc0 LE	65	@param ReturnStr CPSR_STRING_SIZE byte string that contains string\r
a1848bc0 LE	66	version of CPSR\r
6f72e28d	67	\r
	68	**/\r
	69	VOID\r
	70	CpsrString (\r
	71	IN UINT32 Cpsr,\r
	72	OUT CHAR8 *ReturnStr\r
	73	)\r
	74	{\r
429309e0 MK	75	UINTN Index;\r
	76	CHAR8 *Str;\r
	77	CHAR8 *ModeStr;\r
3402aac7	78	\r
11c20f4e	79	Str = ReturnStr;\r
11c20f4e	80	\r
7785b38a PG	81	for (Index = 0; mCpsrChar[Index].BIT != 0; Index++, Str++) {\r
	82	*Str = mCpsrChar[Index].Char;\r
	83	if ((Cpsr & (1 << mCpsrChar[Index].BIT)) != 0) {\r
6f72e28d	84	// Concert to upper case if bit is set\r
	85	*Str &= ~0x20;\r
	86	}\r
	87	}\r
3402aac7	88	\r
6f72e28d	89	*Str++ = '_';\r
429309e0	90	*Str = '\0';\r
3402aac7	91	\r
6f72e28d	92	switch (Cpsr & 0x1f) {\r
429309e0 MK	93	case 0x10:\r
	94	ModeStr = "usr";\r
	95	break;\r
	96	case 0x011:\r
	97	ModeStr = "fiq";\r
	98	break;\r
	99	case 0x12:\r
	100	ModeStr = "irq";\r
	101	break;\r
	102	case 0x13:\r
	103	ModeStr = "svc";\r
	104	break;\r
	105	case 0x16:\r
	106	ModeStr = "mon";\r
	107	break;\r
	108	case 0x17:\r
	109	ModeStr = "abt";\r
	110	break;\r
	111	case 0x1b:\r
	112	ModeStr = "und";\r
	113	break;\r
	114	case 0x1f:\r
	115	ModeStr = "sys";\r
	116	break;\r
	117	\r
	118	default:\r
	119	ModeStr = "???";\r
	120	break;\r
6f72e28d	121	}\r
3402aac7	122	\r
a1848bc0 LE	123	//\r
	124	// See the interface contract in the leading comment block.\r
	125	//\r
	126	AsciiStrCatS (Str, CPSR_STRING_SIZE - (Str - ReturnStr), ModeStr);\r
3402aac7	127	}\r
d5b0f232	128	\r
	129	CHAR8 *\r
	130	FaultStatusToString (\r
	131	IN UINT32 Status\r
	132	)\r
	133	{\r
429309e0	134	CHAR8 *FaultSource;\r
d5b0f232	135	\r
d5b0f232	136	switch (Status) {\r
429309e0 MK	137	case 0x01: FaultSource = "Alignment fault";\r
	138	break;\r
	139	case 0x02: FaultSource = "Debug event fault";\r
	140	break;\r
	141	case 0x03: FaultSource = "Access Flag fault on Section";\r
	142	break;\r
	143	case 0x04: FaultSource = "Cache maintenance operation fault[2]";\r
	144	break;\r
	145	case 0x05: FaultSource = "Translation fault on Section";\r
	146	break;\r
	147	case 0x06: FaultSource = "Access Flag fault on Page";\r
	148	break;\r
	149	case 0x07: FaultSource = "Translation fault on Page";\r
	150	break;\r
	151	case 0x08: FaultSource = "Precise External Abort";\r
	152	break;\r
	153	case 0x09: FaultSource = "Domain fault on Section";\r
	154	break;\r
	155	case 0x0b: FaultSource = "Domain fault on Page";\r
	156	break;\r
	157	case 0x0c: FaultSource = "External abort on translation, first level";\r
	158	break;\r
	159	case 0x0d: FaultSource = "Permission fault on Section";\r
	160	break;\r
	161	case 0x0e: FaultSource = "External abort on translation, second level";\r
	162	break;\r
	163	case 0x0f: FaultSource = "Permission fault on Page";\r
	164	break;\r
	165	case 0x16: FaultSource = "Imprecise External Abort";\r
	166	break;\r
	167	default: FaultSource = "No function";\r
	168	break;\r
	169	}\r
d5b0f232	170	\r
	171	return FaultSource;\r
	172	}\r
	173	\r
429309e0	174	STATIC CHAR8 *gExceptionTypeString[] = {\r
6f72e28d	175	"Reset",\r
6f72e28d	176	"Undefined OpCode",\r
619b3998	177	"SVC",\r
6f72e28d	178	"Prefetch Abort",\r
	179	"Data Abort",\r
	180	"Undefined",\r
	181	"IRQ",\r
	182	"FIQ"\r
	183	};\r
	184	\r
6f72e28d	185	/**\r
6f72e28d	186	This is the default action to take on an unexpected exception\r
3402aac7	187	\r
ff5fef14	188	Since this is exception context don't do anything crazy like try to allocate memory.\r
6f72e28d	189	\r
	190	@param ExceptionType Type of the exception\r
	191	@param SystemContext Register state at the time of the Exception\r
	192	\r
	193	\r
	194	**/\r
	195	VOID\r
	196	DefaultExceptionHandler (\r
429309e0 MK	197	IN EFI_EXCEPTION_TYPE ExceptionType,\r
429309e0 MK	198	IN OUT EFI_SYSTEM_CONTEXT SystemContext\r
6f72e28d	199	)\r
6f72e28d	200	{\r
429309e0 MK	201	CHAR8 Buffer[100];\r
	202	UINTN CharCount;\r
	203	UINT32 DfsrStatus;\r
	204	UINT32 IfsrStatus;\r
	205	BOOLEAN DfsrWrite;\r
	206	UINT32 PcAdjust;\r
7785b38a PG	207	\r
7785b38a PG	208	PcAdjust = 0;\r
6f72e28d	209	\r
429309e0 MK	210	CharCount = AsciiSPrint (\r
	211	Buffer,\r
	212	sizeof (Buffer),\r
	213	"\n%a Exception PC at 0x%08x CPSR 0x%08x ",\r
	214	gExceptionTypeString[ExceptionType],\r
	215	SystemContext.SystemContextArm->PC,\r
	216	SystemContext.SystemContextArm->CPSR\r
	217	);\r
31f53880 AB	218	SerialPortWrite ((UINT8 *)Buffer, CharCount);\r
	219	if (gST->ConOut != NULL) {\r
	220	AsciiPrint (Buffer);\r
	221	}\r
7755dfd3	222	\r
6f72e28d	223	DEBUG_CODE_BEGIN ();\r
429309e0 MK	224	CHAR8 *Pdb;\r
	225	UINT32 ImageBase;\r
	226	UINT32 PeCoffSizeOfHeader;\r
	227	UINT32 Offset;\r
	228	CHAR8 CpsrStr[CPSR_STRING_SIZE]; // char per bit. Lower 5-bits are mode\r
a1848bc0	229	// that is a 3 char string\r
429309e0 MK	230	CHAR8 Buffer[80];\r
	231	UINT8 *DisAsm;\r
	232	UINT32 ItBlock;\r
	233	\r
	234	CpsrString (SystemContext.SystemContextArm->CPSR, CpsrStr);\r
	235	DEBUG ((DEBUG_ERROR, "%a\n", CpsrStr));\r
	236	\r
	237	Pdb = GetImageName (SystemContext.SystemContextArm->PC, &ImageBase, &PeCoffSizeOfHeader);\r
	238	Offset = SystemContext.SystemContextArm->PC - ImageBase;\r
	239	if (Pdb != NULL) {\r
	240	DEBUG ((DEBUG_ERROR, "%a\n", Pdb));\r
	241	\r
	242	//\r
	243	// A PE/COFF image loads its headers into memory so the headers are\r
	244	// included in the linked addresses. ELF and Mach-O images do not\r
	245	// include the headers so the first byte of the image is usually\r
	246	// text (code). If you look at link maps from ELF or Mach-O images\r
	247	// you need to subtract out the size of the PE/COFF header to get\r
	248	// get the offset that matches the link map.\r
	249	//\r
	250	DEBUG ((DEBUG_ERROR, "loaded at 0x%08x (PE/COFF offset) 0x%x (ELF or Mach-O offset) 0x%x", ImageBase, Offset, Offset - PeCoffSizeOfHeader));\r
	251	\r
	252	// If we come from an image it is safe to show the instruction. We know it should not fault\r
	253	DisAsm = (UINT8 *)(UINTN)SystemContext.SystemContextArm->PC;\r
	254	ItBlock = 0;\r
	255	DisassembleInstruction (&DisAsm, (SystemContext.SystemContextArm->CPSR & BIT5) == BIT5, TRUE, &ItBlock, Buffer, sizeof (Buffer));\r
	256	DEBUG ((DEBUG_ERROR, "\n%a", Buffer));\r
	257	\r
	258	switch (ExceptionType) {\r
d629c283	259	case EXCEPT_ARM_UNDEFINED_INSTRUCTION:\r
	260	case EXCEPT_ARM_SOFTWARE_INTERRUPT:\r
	261	case EXCEPT_ARM_PREFETCH_ABORT:\r
	262	case EXCEPT_ARM_DATA_ABORT:\r
	263	// advance PC past the faulting instruction\r
	264	PcAdjust = (UINTN)DisAsm - SystemContext.SystemContextArm->PC;\r
	265	break;\r
3402aac7	266	\r
d629c283	267	default:\r
d629c283	268	break;\r
6f72e28d	269	}\r
429309e0 MK	270	}\r
429309e0 MK	271	\r
6f72e28d	272	DEBUG_CODE_END ();\r
a4a582e1 MK	273	DEBUG ((DEBUG_ERROR, "\n R0 0x%08x R1 0x%08x R2 0x%08x R3 0x%08x\n", SystemContext.SystemContextArm->R0, SystemContext.SystemContextArm->R1, SystemContext.SystemContextArm->R2, SystemContext.SystemContextArm->R3));\r
	274	DEBUG ((DEBUG_ERROR, " R4 0x%08x R5 0x%08x R6 0x%08x R7 0x%08x\n", SystemContext.SystemContextArm->R4, SystemContext.SystemContextArm->R5, SystemContext.SystemContextArm->R6, SystemContext.SystemContextArm->R7));\r
	275	DEBUG ((DEBUG_ERROR, " R8 0x%08x R9 0x%08x R10 0x%08x R11 0x%08x\n", SystemContext.SystemContextArm->R8, SystemContext.SystemContextArm->R9, SystemContext.SystemContextArm->R10, SystemContext.SystemContextArm->R11));\r
	276	DEBUG ((DEBUG_ERROR, " R12 0x%08x SP 0x%08x LR 0x%08x PC 0x%08x\n", SystemContext.SystemContextArm->R12, SystemContext.SystemContextArm->SP, SystemContext.SystemContextArm->LR, SystemContext.SystemContextArm->PC));\r
	277	DEBUG ((DEBUG_ERROR, "DFSR 0x%08x DFAR 0x%08x IFSR 0x%08x IFAR 0x%08x\n", SystemContext.SystemContextArm->DFSR, SystemContext.SystemContextArm->DFAR, SystemContext.SystemContextArm->IFSR, SystemContext.SystemContextArm->IFAR));\r
d5b0f232	278	\r
	279	// Bit10 is Status[4] Bit3:0 is Status[3:0]\r
	280	DfsrStatus = (SystemContext.SystemContextArm->DFSR & 0xf) \| ((SystemContext.SystemContextArm->DFSR >> 6) & 0x10);\r
429309e0	281	DfsrWrite = (SystemContext.SystemContextArm->DFSR & BIT11) != 0;\r
d5b0f232	282	if (DfsrStatus != 0x00) {\r
a4a582e1	283	DEBUG ((DEBUG_ERROR, " %a: %a 0x%08x\n", FaultStatusToString (DfsrStatus), DfsrWrite ? "write to" : "read from", SystemContext.SystemContextArm->DFAR));\r
d5b0f232	284	}\r
65e27445	285	\r
	286	IfsrStatus = (SystemContext.SystemContextArm->IFSR & 0xf) \| ((SystemContext.SystemContextArm->IFSR >> 6) & 0x10);\r
	287	if (IfsrStatus != 0) {\r
a4a582e1	288	DEBUG ((DEBUG_ERROR, " Instruction %a at 0x%08x\n", FaultStatusToString (SystemContext.SystemContextArm->IFSR & 0xf), SystemContext.SystemContextArm->IFAR));\r
d5b0f232	289	}\r
6f72e28d	290	\r
a4a582e1	291	DEBUG ((DEBUG_ERROR, "\n"));\r
6f72e28d	292	ASSERT (FALSE);\r
3402aac7	293	\r
5c8bc8be AB	294	CpuDeadLoop (); // may return if executing under a debugger\r
5c8bc8be AB	295	\r
bb02cb80	296	// Clear the error registers that we have already displayed incase some one wants to keep going\r
	297	SystemContext.SystemContextArm->DFSR = 0;\r
	298	SystemContext.SystemContextArm->IFSR = 0;\r
	299	\r
3402aac7	300	// If some one is stepping past the exception handler adjust the PC to point to the next instruction\r
d629c283	301	SystemContext.SystemContextArm->PC += PcAdjust;\r
6f72e28d	302	}\r